Rails 3-best_in_place编辑 [英] Rails 3 - best_in_place editing

问题描述

希望有一个简单的答案；我正在使用宝石 best_in_place ，它的效果很好.我试图弄清楚如何使用以下方法创建下拉菜单:

Hopefully a simple answer; I am using the gem best_in_place and it works great. I'm trying to figure out how to create a drop down menu using:

:type => :select, :collection => []

我想做的是传递从用户模型输入的名称列表.

What I want to be able to do is pass in a list of names that have been entered from my user model.

有没有想到该怎么做?我可以将其与c​​ollection_select混合吗?

Any thoughts how to do this? Can I mix it with collection_select?

推荐答案

:collection参数接受键/值对的数组:

The :collection parameter accepts an array of key/value pairs:

    [ [key, value], [key, value], [key, value], ... ]

其中键是选项值，而 value 是选项文本.

最好在模型中生成该数组，该模型与要为其生成选项列表的对象相对应，而不是在视图中.

It is best to generate this array in the model corresponding to the object for which you want to generate a list of options for, and not in your view.

听起来像是best_in_place处于运行状态，所以这是一个项目显示页面的简单示例，您想在其中使用best_in_place来通过选择框更改特定项目的分配用户.

Sounds like you have best_in_place up and running, so here's a simple example of a project show page, where you want to use best_in_place to change the assigned user for a particular project with a select box.

## CONTROLLER

# GET /projects/1
# GET /projects/1.xml
# GET /projects/1.json
def show
  @project = Project.find(params[:id])

  respond_to do |format|
    format.html
    format.xml  { render :xml => @project.to_xml }
    format.json { render :json => @project.as_json }
  end
end


## MODELS

class User
  has_many :projects

  def self.list_user_options 
    User.select("id, name").map {|x| [x.id, x.name] }
  end
end

class Project
  belongs_to :user
end


## VIEW (e.g. show.html.erb)
## excerpt

<p>
  <b>Assigned to:</b>
  <%= best_in_place @project, :user_id, :type => :select, :collection => User::list_user_options %>
</p>

# note :user_id and not :user

请注意，从内存中， best_in_place 的主版本会发送ajax请求，以选择框是否值是否更改.

Note that from memory, the master version of best_in_place sends the ajax request for a select box whether the value is changed or not.

还有一些需要牢记的地方； best_in_place用于修改"现有记录，而不是创建新记录(为此，请在新页面的_form部分中使用collection_select).

Also something to keep in mind; best_in_place is for "in place" editing of existing records, not creating new ones (for that, use collection_select in your _form partial for the new page).

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